Nordic American Tankers Ltd. (NYSE:NAT) shares surged 3.83 percent to $9.50 in post-market trading. The company announced Friday that it had acquired 100 percent of the shares of Scandic American Shipping Ltd, its management company since 2004.

Five Star Quality Care Inc. (NYSE:FVE) shares surged 2.21 percent to $5.56 in post-market trading. The stock has a 52-week low of $2.98, a 52-week high of $5.98 and $260.71 million in market capitalization.

AbbVie Inc. (NYSE:ABBV) shares gained 1.92 percent to $34.50 in post-market trading. The company’s stock was initiated with a “neutral” rating at UBS AG Friday with a price target of $36.00.

Navistar International Corp. (NYSE:NAV) shares fell 1.82 percent to $23.61 in post-market trading. The stock has a 52-week low of $18.17, a 52-week high of $48.18 and $1.92 billion in market capitalization.

General Cable Corp. (NYSE:BGC) shares declined 1.75 percent to $32.12 in post-market trading. The stock has a 52-week low of $23.73, a 52-week high of $34.89 and $1.63 billion in market capitalization.

Qihoo 360 Technology Co. Ltd. (NYSE:QIHU) shares fell 1.70 percent to $32.44 in post-market trading. The stock has a 52-week low of $13.80, a 52-week high of $33.13 and $7.78 billion in market capitalization.